The population of Uzbekistan is very young: 34.1% of its people are younger than 14. According to official sources, Uzbeks comprise a majority (80%) of the total population. Other ethnic groups include Russians 5.5%, Tajiks 5%, Kazakhs 3%, Karakalpaks 2.5%, and Tatars 1.5% (1996 estimates).[1] There is some controversy about the percentage of the Tajik population. Official data from Uzbekistan that put the number of Tajiks at 5% of the population do not include ethnic Tajiks who, for a variety of reasons, choose to identify themselves as Uzbeks in population census forms.[2] Some Western scholars, citing anonymous "observers" or "Tajiks around the country", accordingly estimate the number of Tajiks in Uzbekistan at 20%[3] or even as high as 25%-30%.